| AACO | Arizona Association of Counties (skr.) |
|---|---|
| AAD | Applied Acoustic Design (skr.) |
| AAM | Advertising Account Manager |
| AAS | Applied Acoustics Systems |
| AAS | Australian Accounting Standard |
| AAS | Australian Acoustical Society, |
| AAT | Association of Accounting Technicians |
| ABA | Accredited Business Accountant |
| AC | abcoulomb (zn.) |
| AC | account (skr.), účet (angl.skr.) |